Introduction - Cambridge University Press
... Figure 1.3a shows our sector of the Galaxy: a view centred on the Sun, which is a nondescript star lost in the host of stars comprising the Orion Arm. The bright stars of Orion, familiar to many people from the naked-eye night sky, are prominent in this view: they give our local spiral arm its name. ...
... Figure 1.3a shows our sector of the Galaxy: a view centred on the Sun, which is a nondescript star lost in the host of stars comprising the Orion Arm. The bright stars of Orion, familiar to many people from the naked-eye night sky, are prominent in this view: they give our local spiral arm its name. ...
Investigating the Wavelength Dependency of Dot Gain in Color Print
... In this study, 21 patches with different coverage of cyan, magenta, yellow, and black have been printed. All the patches are halftoned by AM (150 lpi, 1200 dpi) and printed by commercial offset press (Heidelberg) on coated paper (150 gr/m2 ). The reference dot area coverage of the patches are (0, 5, ...
... In this study, 21 patches with different coverage of cyan, magenta, yellow, and black have been printed. All the patches are halftoned by AM (150 lpi, 1200 dpi) and printed by commercial offset press (Heidelberg) on coated paper (150 gr/m2 ). The reference dot area coverage of the patches are (0, 5, ...
Composition-Tunable Properties Of CdSxTe1
... should be discarded because of relatively narrow widths of the observed fluorescence emission, which indicates quasi-monodispersity of nanoparticles. We therefore believe that a monotonous absorption spectrum is an intrinsic feature of the fabricated CdSxTe1-x alloys. As shown in Figure 3, the nanoc ...
... should be discarded because of relatively narrow widths of the observed fluorescence emission, which indicates quasi-monodispersity of nanoparticles. We therefore believe that a monotonous absorption spectrum is an intrinsic feature of the fabricated CdSxTe1-x alloys. As shown in Figure 3, the nanoc ...
Grosdidier et al. 1998
... Low resolution spectroscopy; challenging due to high extinction, stellar crowding, high metallicity. High resolution spectroscopy almost impossible (McWilliam & Rich 1994 analyzed CTIO echelle spectra of 11 giants). R=16,000,S/N=30 Galactic globular clusters, disk, and halo composition well understo ...
... Low resolution spectroscopy; challenging due to high extinction, stellar crowding, high metallicity. High resolution spectroscopy almost impossible (McWilliam & Rich 1994 analyzed CTIO echelle spectra of 11 giants). R=16,000,S/N=30 Galactic globular clusters, disk, and halo composition well understo ...
CHEMICAL ABUNDANCE DISTRIBUTIONS OF GALACTIC HALOS
... is translated into a stellar mass through a simple star formation prescription (see Robertson et al. 2005 and x 2.2 for more details). Star formation ceases soon after accretion onto the main halo, as it is assumed that the gas is lost at that point due to ram pressure stripping. The free parameters ...
... is translated into a stellar mass through a simple star formation prescription (see Robertson et al. 2005 and x 2.2 for more details). Star formation ceases soon after accretion onto the main halo, as it is assumed that the gas is lost at that point due to ram pressure stripping. The free parameters ...
The Physical Nature of Cosmic Accretion of Baryons and Dark Matter
... our assumed mass profile inside the halo. For example, using an isothermal profile instead of NFW gives results that are consistent at the ∼ 10% level. Figure 2 shows the predicted values of the enclosed overdensity. Throughout this paper, we define overdensities relative to the mean matter density, ...
... our assumed mass profile inside the halo. For example, using an isothermal profile instead of NFW gives results that are consistent at the ∼ 10% level. Figure 2 shows the predicted values of the enclosed overdensity. Throughout this paper, we define overdensities relative to the mean matter density, ...
Photonic crystal slot nanobeam slow light
... distance between the symmetric holes 共650 nm兲, diameter of the holes 共310 nm兲 and the thickness of the membrane 共220 nm兲. Since the nanobeam is intended as a liquid sensor, the bandstructure calculation from MPB is performed for an environment refractive index of 1.333, corresponding to water, and i ...
... distance between the symmetric holes 共650 nm兲, diameter of the holes 共310 nm兲 and the thickness of the membrane 共220 nm兲. Since the nanobeam is intended as a liquid sensor, the bandstructure calculation from MPB is performed for an environment refractive index of 1.333, corresponding to water, and i ...
The white dwarf cooling sequence of 47 Tucanae
... dwarf formation rate. Thus, the position in the sorted list is proportional to the time spent on the cooling sequence. Their sorted, completeness-corrected distribution of effective temperatures is shown Fig. 2 as a grey shaded band, which includes the 1σ statistical errors. Also shown for illustrat ...
... dwarf formation rate. Thus, the position in the sorted list is proportional to the time spent on the cooling sequence. Their sorted, completeness-corrected distribution of effective temperatures is shown Fig. 2 as a grey shaded band, which includes the 1σ statistical errors. Also shown for illustrat ...
1.9 W yellow, CW, high-brightness light from a high efficiency
... Laser diode-based systems offer relief from many of these drawbacks. They lend themselves well to integration into compact, cheap and highly efficient systems. However, laser diodes emitting directly in the yellow-orange spectral region are so far limited to powers on the scale of a few mW, demonst ...
... Laser diode-based systems offer relief from many of these drawbacks. They lend themselves well to integration into compact, cheap and highly efficient systems. However, laser diodes emitting directly in the yellow-orange spectral region are so far limited to powers on the scale of a few mW, demonst ...
here
... In order to understand the mechanics of interference we need to look more closely at the interaction of light with the bubble film. A ray of light v strikes the outer surface of the film; a fraction t of the ray is transmitted and the rest (1-t) is reflected. Since the ray is traveling from a high s ...
... In order to understand the mechanics of interference we need to look more closely at the interaction of light with the bubble film. A ray of light v strikes the outer surface of the film; a fraction t of the ray is transmitted and the rest (1-t) is reflected. Since the ray is traveling from a high s ...
Solutions - Dynamic Science
... to the flavour of cinnamon. Its structure is shown below. Draw structural formulae for the organic products and chemical formulae for all other products formed in the following reactions. ...
... to the flavour of cinnamon. Its structure is shown below. Draw structural formulae for the organic products and chemical formulae for all other products formed in the following reactions. ...
Braking of the space crafts caused by the vacuum
... virtual particles, resulting in energy loss. That is to say that the photon moves not in an "empty space", but in the "field environment", consisting of the "sea" of the virtual particles. Charged virtual particles being under the influence of the changing electromagnetic field begin its own oscilla ...
... virtual particles, resulting in energy loss. That is to say that the photon moves not in an "empty space", but in the "field environment", consisting of the "sea" of the virtual particles. Charged virtual particles being under the influence of the changing electromagnetic field begin its own oscilla ...
Evidence for tautomerism in nucleic acid base
... parameters which can be extracted from the calculation of the lineshape. In the region 8Os~1«k12"25O s" 1 the lineshape does not change very much although vj, v2, WQ, and xj can be determined without ambiguity. The only significant change in this region is the apparent coupling constant which change ...
... parameters which can be extracted from the calculation of the lineshape. In the region 8Os~1«k12"25O s" 1 the lineshape does not change very much although vj, v2, WQ, and xj can be determined without ambiguity. The only significant change in this region is the apparent coupling constant which change ...
Low threshold current and widely tunable external cavity lasers with
... than 90 mA (0.9 kA/cm2) across the 130 nm tuning range; nonetheless, the maximum threshold at tuning-wavelength ends is about 1.2 times its solitary threshold current of 75 mA. The mechanism is two fold. First, the grating-forced operation can suppress the internal FP emissions within spectral width ...
... than 90 mA (0.9 kA/cm2) across the 130 nm tuning range; nonetheless, the maximum threshold at tuning-wavelength ends is about 1.2 times its solitary threshold current of 75 mA. The mechanism is two fold. First, the grating-forced operation can suppress the internal FP emissions within spectral width ...
Study on high signal-to-noise ratio (SNR) silicon p
... SNR can be over 104 within the wavelength range of 500–600 nm and the peak of spectral responsivity is 0.48 A/W at about 520 nm. 3.1. Optimizing the p-n junction depth xj The 1/α is penetration depth of light wavelength λ, where α is photoabsorption coefficient. For the devices whose junction depth ...
... SNR can be over 104 within the wavelength range of 500–600 nm and the peak of spectral responsivity is 0.48 A/W at about 520 nm. 3.1. Optimizing the p-n junction depth xj The 1/α is penetration depth of light wavelength λ, where α is photoabsorption coefficient. For the devices whose junction depth ...
Reassessing the formation of the inner Oort cloud
... orbits with semi-major axes ∼ 200 AU and included an approximate model of the tidal field of the gas and passing stars from the cluster. The cluster had a maximum stellar number density of 100 pc−3 and the maximum mass density of the core of the molecular cloud gas was 5000 M⊙ pc−3 . Their simulatio ...
... orbits with semi-major axes ∼ 200 AU and included an approximate model of the tidal field of the gas and passing stars from the cluster. The cluster had a maximum stellar number density of 100 pc−3 and the maximum mass density of the core of the molecular cloud gas was 5000 M⊙ pc−3 . Their simulatio ...
HCN Polymers: Composition And Structure Revisited By High
... under high vaccum conditions (< 10−7 mbars). We have also acquired spectra with a KBr pellet. Results In the entire mass range studied, more than 1600 different molecules have been detected (Figure1). Thanks to the high resolution of the Orbitrap, we obtained the atomic content of each molecule pres ...
... under high vaccum conditions (< 10−7 mbars). We have also acquired spectra with a KBr pellet. Results In the entire mass range studied, more than 1600 different molecules have been detected (Figure1). Thanks to the high resolution of the Orbitrap, we obtained the atomic content of each molecule pres ...
Problems with Light Emitting Devices and Their Solutions
... semiconductors have been used for conventional LEDs. Among these semiconductors, InGaAsP has been used for optical fiber communication systems because the wavelength of the emitted light is 1.00–1.70 µm (E g = 0.73–1.24 eV) [2, 3]. When fabricating a highly efficient infrared LED or laser using InGa ...
... semiconductors have been used for conventional LEDs. Among these semiconductors, InGaAsP has been used for optical fiber communication systems because the wavelength of the emitted light is 1.00–1.70 µm (E g = 0.73–1.24 eV) [2, 3]. When fabricating a highly efficient infrared LED or laser using InGa ...
Influence of the Gould Belt on Interstellar Extinction
... (2008a) but in the extinction, whose accuracy depends primarily on the accuracy of the multiband photometry used. Therefore, for this study, the stars with photometry less accurate than 0.05m at least in one of the Tycho-2 and 2MASS bands under consideration were excluded from our sample: BT , VT , ...
... (2008a) but in the extinction, whose accuracy depends primarily on the accuracy of the multiband photometry used. Therefore, for this study, the stars with photometry less accurate than 0.05m at least in one of the Tycho-2 and 2MASS bands under consideration were excluded from our sample: BT , VT , ...
THE EVOLUTION OF GALAXY NUMBER DENSITY AT Z < 8 AND
... which are at a given redshift. This requires extrapolating fitted stellar mass functions to reach down to a low mass limit of the galaxy population. There are many ways in which this can be done which we discuss below. One of the most important questions is the lower limit at which we should count g ...
... which are at a given redshift. This requires extrapolating fitted stellar mass functions to reach down to a low mass limit of the galaxy population. There are many ways in which this can be done which we discuss below. One of the most important questions is the lower limit at which we should count g ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.